Re: [PATCH -v1.1] x86/topology: Document cpu_llc_id
From: Yazen Ghannam
Date: Thu Nov 17 2016 - 13:32:29 EST
On Thu, Nov 17, 2016 at 10:45:57AM +0100, Borislav Petkov wrote:
> It means different things on Intel and AMD so write it down so that
> there's no confusion.
> Signed-off-by: Borislav Petkov <bp@xxxxxxx>
> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: Yazen Ghannam <yazen.ghannam@xxxxxxx>
> Documentation/x86/topology.txt | 9 +++++++++
> 1 file changed, 9 insertions(+)
> diff --git a/Documentation/x86/topology.txt b/Documentation/x86/topology.txt
> index 06afac252f5b..f3e9d7e9ed6c 100644
> --- a/Documentation/x86/topology.txt
> +++ b/Documentation/x86/topology.txt
> @@ -63,6 +63,15 @@ The topology of a system is described in the units of:
> The maximum possible number of packages in the system. Helpful for per
> package facilities to preallocate per package information.
> + - cpu_llc_id:
> + A per-CPU variable containing:
> + - On Intel, the first APIC ID of the list of CPUs sharing the Last Level
> + Cache
> + - On AMD, the Node ID or Core Complex ID containing the Last Level
> + Cache. In general, it is a number identifying an LLC uniquely on the
> + system.
> * Cores:
Look good to me.